Fort la Latte, or the Castle of the Rock Goyon (French: La Roche-Goyon, Breton: Roc'h-Goueon), is a castle in the northeast of Brittany, about 4 kilometres (2.5 mi) southeast of Cap Fréhel and about 35 kilometres (22 mi) west of Saint-Malo, in the commune of Plévenon, Côtes-d'Armor.

It is a famous tourist attraction of the bay of Saint-Malo and the Emerald Coast (France) Côte d'Émeraude. This impressive castle was built on a small piece of land at the Bay of the Fresnay in the 14th century. Various films have been shot at this site, including The Vikings (1958) by Richard Fleischer with Kirk Douglas and Tony Curtis. It also features in the French band Manau's video for "La Tribu de Dana." A much larger, fictionalized version of the fort appears in the 2015 animated film April and the Extraordinary World.